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Issue 5, 2016
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Exploiting non-equilibrium phase separation for self-assembly

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Abstract

Demixing can occur in systems of two or more particle species that experience different driving forces, e.g., mixtures of self-propelled active particles or of oppositely charged colloids subject to an electric field. Here we show with macroscopic experiments and computer simulations that the forces underlying such non-equilibrium segregation can be used to control the self-assembly of particles that lack attractive interactions. We demonstrate that, depending on the direction, amplitude and frequency of a periodic external force acting on one particle species, the structures formed by a second, undriven species can range from compact clusters to elongated, string-like patterns.

Graphical abstract: Exploiting non-equilibrium phase separation for self-assembly

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Supplementary files

Article information


Submitted
31 Jul 2015
Accepted
28 Nov 2015
First published
30 Nov 2015

Soft Matter, 2016,12, 1517-1524
Article type
Paper

Exploiting non-equilibrium phase separation for self-assembly

M. Grünwald, S. Tricard, G. M. Whitesides and P. L. Geissler, Soft Matter, 2016, 12, 1517
DOI: 10.1039/C5SM01922B

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